Ophthalmic mounting



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OPHTHLMIG MOUNTING Filed Maroime, 1944 LLOYD G. MITBY `JOHN R. RAMSTORF Patented Jan. 2l, 1947 2,414,757 OPHTHALMIC MOUNTING Lloyd G. Mitby and John R. Ramstorf, Minneapolis, Minn., assignors to Bausch & Lomb Optical Company, Rochester, N. Y., a corporation of New York I Application March 16, 1944, Serial No. 526,723

This invention relates to ophthalmic mount- Yings and goggles and more particularly has reference to supplementary lens attachments which are hingedly connected to spectacles and goggles. In spectacles and goggles of this type, it is customary to provide spring means for normally urging the supplementary lenses out of cooperative relation with the spectacle or goggle and retaining means for selectively holding the supplementary lenses in front of the spectacle or goggle in cooperative relation thereto.

It is an object of our invention to provide improved spring means in spectacles and goggles of the type described for normally urging the supplementary lenses away from the spectacle or goggle. A further object is to provide detachable spring means in devices of the type described whereby the supplementary lenses and frame may be selectively detached from the spectacle or goggle. These and other objects and advantages reside in certain novel features of construction, arrangement and combination of parts as will hereinafter be more fully described and pointed out in the appended claims.

Referring to the drawing:

Fig. l is a front perspective view of a spectacle embodying our invention.

Fig. 2 is a rear perspective view thereof showing the supplementary lenses swung away from the spectacle.

Figs. 3 and 4 are sectional views showing, respectively, the positions of the spring when the supplementary lenses are in and out of cooperative relation with the spectacle.

Fig. 5 is a rear View of the bridge and a Inodied spring member.

Fig. 6 is a section on line 2 5 of Fig. 5. Fig. 7 is a section on line 'I-l of Fig. 5. Fig. 8 is a View of another modication.

A preferred embodiment of our invention is shown in the drawing wherein lll indicates a spectacle frame having the lenses II and I2 mounted, respectively, in eyewires I3 and I4 connected by a bridge i5 and a brace bar It. The nasal sides of the eyewires carry the usual nose engaging pads Il while the temporal sides of the eyewires pivotally support temples I8.

The supplementary spectacle is comprises the lenses 2% and 2l held, respectively, in eyewires 22 and 23 connected by bridge 215. The supplementary spectacle is hingedly connected to the spectacle I l) by hinges 25 secured to the upper parts of the respectively adjacent eyewires The supplementary spectacle I@ is normally urged away from the spectacle EB by a leaf spring 3 claims. (c1. ca -41) such as pivotedcatch 21, more fully disclosed in member 26 having one end portion secured to bridge I 5 by soldering, welding or any other suitable method. The spring member 25` extends upwardly from bridge I5, thence downwardly behind the bridge 2Q and thence under the bridge 24 as shown in Figs. 1 and 3 of the drawing. In this position of the spring 26, the supplementary spectacle is positioned in cooperative relation in front of the spectacle frame I0 and is selectively held in such position by any suitable means,

United States Patent No. 2,282,637.

Upon release of the catch 21, the spring member 28 urges the supplementary spectacle I9 away from and out of cooperative relation with the frame Ill, as shown in Fig. 2. This is accomplished because the spring member 26 has one of its ends secured to bridge I5 while the other end portion 28 of the spring isin sliding contact with the bridge 24 of the supplementary spectacle I9. When the supplementary spectacle is in the position shown in Fig. 2, the spring member 2S is positioned with respect to the bridges: I5 and 24 as shown in Fig. 4.

In the modication shown in Figs. 5, 6 and 7, the end portion of leaf spring member 26' carries a resilient member 29 which is secured thereto by soldering, welding or any other suitable method. The member 29 has two laterally extending arms 30 having hooked ends 3l which engage the apertures 32 at the respective sides of bridge I5. With this construction, the leaf spring member 26 is detachably secured to frame Ill. A further modication is shown in Fig. 8 wherein the end portion of leaf spring member 26 has two integral arms 30' which extend laterally so that the hooked ends 3l of the arms may engage the apertures 32 of the bridge I5.

It is to be understood that Figs. 5-8 merely show modiiied structures for detachably securing the end of the leaf spring memberl to the bridge I5 instead of employing the soldering or welding as disclosed in Figs. 1 4. By providing a detachable spring member and removable hinge pins for hinges 25, the operator may readily detach the supplementary frame I9 from the spectacle I0 when it is desired to use only the spectacle IE! for long periods of time.

From the foregoing, it will be apparent that we are able to attain the objects of our invention and provide an improved spring member for normally urging a hinged supplementary spectacle away from the spectacle to which it is attached. With our improved construction, the springs may be readily replaced when they break and it also is possi-ble to provide springs which are strong enough to swing out the supplementary frame even when carrying relatively thick, heavy lenses. It will be obvious that our invention may be applied to either spectacles or goggles and the use of the term spectacle throughout thespecication is to be understood as including goggles. may, of course, carry lenses which may he tinted or otherwise formed to provide supplementary protection against harmful light rays or mechanical shock. Various modications can obviously be'made without departingfrom the spirit'of our invention as pointed out inthefappendedclaims.

We claim:

1. In a spectacle yframe having a supplementary frame connected thereto by hingemeans positioned at the tops of the frames, thecombination of means yieldably urging the supplementary frame away from the `irst-named frame, said means comprising a leaf spring member, arms extending laterally from said member, said arms engagingparts'of the bridge of the first-named `f1arne for detachably securing the member thereto, the member extending upwardly from said last-named bridge, `thence downwardly and in contact with the underside of the bridge of the Y' supplementary frame when the latter is held in Ywith apertures, a supplementary frame carrying The supplementary frame I9.

4 lenses hingedly connected to the upper parts o the spectacle frame, spring means yieldably urging the supplementary frame away from the spectacle frame, retaining means for selectively holding the supplementary frame in front of the spec,-

tacle frameagainst the tension of the spring means, said vspring means comprising a spring member having arms extending laterally therefrom and secured in said apertures for detachably holding the member to the spectacle frame, said. member extending under the bridge of the 'supplementary 'frame may be positioned in front .of tor-:swung away from the rst-named frame,

means yieldably urging the supplementary frame away from the .rst-,named frame, said ,means comprisinga springmember, and meansfor deytachablysecuring-one:end ofthe member to an Vupperpart of the first-named,v frame, saidmember extending along the rear-and under sides of a bridge member of the supplementaryframe and having slidingengagement therewith when the supplementary frameA is moved on the hinge *means LLOYD' G. MITBY. JOHN'R. RAMSTORF. 

